RADIOACTIVE DECAY PROBLEMS
1. Write α-decay equations for the following:
a. Rn
b. Pu
2. Write β-decay equations for the following:
a. N
b. Bi
3. The parent nuclide of the thorium decay series is Th. The first four decays are as follows: alpha emission, beta emission, beta emission and alpha emission. Write the nuclear equations for this series of emission.
Half-Life Problems
1. The half-life of one radon isotope is 3.8 days. If a sample of gas contains 4.38 g of radon-222, how much radon will remain in the sample after 15.2 days? (0.274 g)
2. The half-life of thorium-234 is 24.10 days. How many days until only 1/16 of a 52.0 g sample of thorium -234 remains? (96.40 days)
3. The half-life of carbon-14 is 5715 years. How long will it be until only half of the carbon-14 in a sample remains? (5715 years)
4. After 4797 years, how much of an original 0.450 g of radium-226 remains? The half-life of radium-226 is 1599 years. (0.056 g)
RADIOACTIVE DECAY PROBLEMS
1. Write α-decay equations for the following:
a. Rn
b. Pu
2. Write β-decay equations for the following:
a. N
b. Bi
3. The parent nuclide of the thorium decay series is Th. The first four decays are as follows: alpha emission, beta emission, beta emission and alpha emission. Write the nuclear equations for this series of emission.
Half-Life Problems
1. The half-life of one radon isotope is 3.8 days. If a sample of gas contains 4.38 g of radon-222, how much radon will remain in the sample after 15.2 days? (0.274 g)
2. The half-life of thorium-234 is 24.10 days. How many days until only 1/16 of a 52.0 g sample of thorium -234 remains? (96.40 days)
3. The half-life of carbon-14 is 5715 years. How long will it be until only half of the carbon-14 in a sample remains? (5715 years)
4. After 4797 years, how much of an original 0.450 g of radium-226 remains? The half-life of radium-226 is 1599 years. (0.056 g)